This is just a reference guide to whoever's out there that's thinking of getting these awesome base clamps As some of you may know, the Gamma website does not list the actual dimensions to either of the two of these base clamps. Gamma's website lists MQAC-10: For upright machines (w/ suspension mounting system) MQAC-11: For progression 2 or 5003 (w/quick mount) I thought the 11's were meant for lower profile machines, which is at least what I thought progression 2 is. I have an Eagnas flex 940 stringing machine so I thought I would simply get the ones that DinkAlot's got (MQAC-11). Upon receiving them, they looked way too tall for the application. I contacted ATS cause I thought they might have sent me the 10's even though I got billed for he 11's. There was no way of telling which ones I received because there was no model number stamped on either of those base clamps. Turns out the order was correct. Bummer I thought I'd start this thread so the next person ordering doesn't mess up their order since ATS/Gamma does not list dimensional specs on their websites. I even asked ATS why and they simply said they don't want their competitors using Gamma clamps(pffffft...) So here goes ... Dimensions MQAC-10: 3 1/4" tall from the base (short) MQAC-11: 4 1/8" tall from the base (tall) I hope someone will learn from my mistake instead of making their own. I ended up taking my base clamps to a machine shop and have them trim it down for me. These are awesome base clamps, I have not seen any slippage at all and they're are very smooth to operate. They are on the expensive side but well worth the investment. Happy Stringing!